Consider using Symfony Form and use like this:
<?php
$request = $this->getRequest(); // or inject Request to the action method like myAction(Request $request)
$em = $this->getDoctrine()->getManager();
$company = $em->getRepository('CatalogWebBundle:ComCompany')
->findOneBy(
array('cmpCode' => $id)
);
$form = $this->createForm('formName', $company);
$form->handleRequest($request);
if($form->isValid()) {
// if you want, you can get entity here,
// but passing an entity in 2nd param of createForm
// provides automatic binding data
$data = $form->getData();
$em->flush();
// do some action after submitting form...
return $this->redirect($this->generateUrl('companies'));
}
Read more about creating forms:
http://symfony.com/doc/current/book/forms.html
And about regitering forms as services for futher use named form in createForm('NAME_HERE', $bindObjectHere):
http://symfony.com/doc/current/book/forms.html#defining-your-forms-as-services